diff --git a/NEWS b/NEWS
index 476cbb1..d1aeeda 100644
--- a/NEWS
+++ b/NEWS
@@ -51,6 +51,6 @@ Dependencies
 
  * GTK+ >= 2.18
  * FFmpeg libraries:
-   * libavcodec
+   * libavcodec >= 52.56.0 (r22291)
    * libavformat
    * libavutil
diff --git a/configure.ac b/configure.ac
index 7f86c63..4c80980 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ AM_PROG_VALAC([0.7.0])
 AC_PROG_INSTALL
 AC_PROG_INTLTOOL([0.35])
 
-pkg_modules="gtk+-2.0 >= 2.18.0 libavformat libavcodec libavutil"
+pkg_modules="gtk+-2.0 >= 2.18.0 libavformat libavcodec >= 52.56.0 libavutil"
 PKG_CHECK_MODULES(SPEK, [$pkg_modules])
 AC_SUBST(SPEK_CFLAGS)
 AC_SUBST(SPEK_LIBS)
diff --git a/src/spek-audio.c b/src/spek-audio.c
index a7f911a..892e613 100644
--- a/src/spek-audio.c
+++ b/src/spek-audio.c
@@ -141,14 +141,8 @@ gint spek_audio_read (SpekAudioContext *cx) {
 	for (;;) {
 		while (cx->packet->size > 0) {
 			buffer_size = cx->buffer_size;
-#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT (52, 23, 0)
 			len = avcodec_decode_audio3 (
 				cx->codec_context, (int16_t *) cx->buffer, &buffer_size, cx->packet);
-#else
-			len = avcodec_decode_audio2 (
-				cx->codec_context, (int16_t *) cx->buffer, &buffer_size,
-				cx->packet->data, cx->packet->size);
-#endif
 			if (len < 0) {
 				/* Error, skip the frame. */
 				cx->packet->size = 0;